The USDA.GOV website lists this plant as a native plant to the eastern section of the US. It also state the Native Americans relied on this plant for sustenance. I even checked the noxious/invasive plants list and did not find it there. Should be a safe plant to use.

Well worth growing for it's delicate pea like flowers. A real keeper in a "natural" garden. Grows fast and isnt fussy. Leaves are as delicate looking as the flowers. Great for covering string/board arbours.